QST magazine printed a comprehensive three part article in 2002 addressing lighting: Lightning Protection for the Amateur Radio Station. They are republished by the ARRL.
The surest way to protect your radio gear is to disconnect it from power, from the antenna, from your computer and even from ground. And even that is no guarantee -- a while back I had an enormous chargebolt of lightning strike my backyard. I had three transceivers; one rig was still connected to my computer and both the computer and rig were smoldering. The other two rigs were also fried despite being disconnected from power and antenna. My presumption is that the magnetic and electrical chargeselectromagnetic field from the lightning werewas powerful enough to resonate and over loaddestroy components in the rigs.
It's a hassle, but disconnect your rigs from power, antenna and computer.